000 00271nam a2200121Ia 4500
008 170324s9999 xx 000 0 und d
082 _a574.072
100 _a"Elston, Robert C."
245 0 _aEssentials of biostatistics
260 _c1987
365 _b0.00
942 _cBK
999 _c4340
_d4340